title: Spurious precision? Meta-analysis of observational studies.
authors.affiliation: Department of Social Medicine, University of Bristol. m.egger@bristol.ac.uk
authors.forename: M
authors.initials: M
authors.lastname: Egger
authors.forename: M
authors.initials: M
authors.lastname: Schneider
authors.forename: G
authors.initials: G
authors.lastname: Davey Smith
mesh_terms: D000704:Analysis of Variance; D015982:Bias; D015986:Confounding Factors, Epidemiologic; D015201:Meta-Analysis as Topic; D016032:Randomized Controlled Trials as Topic